Improvement in bolts for safe-doors



LJH. MILLER; Improvement vinBolls for Safes, Uoors,'&c. No. 131,699.

`Pa'tented Sep. 24, 1872*.

I NVENTO R.

fl l" v W ITN ESSESQ Qur. f/foN-L/maaRl/w/a cam: fasaamvss fmwrssjUNITED-STATES LUEE H. MILLER, or BALTIMORE,MARYLAND.

To all whom it may concern:

Be it known that I, LUKE H. MILLER, ot the city of Baltimore, Maryland,have invented a new and Improved Method of Fastening the Doors of Fireand Burglar Proof Safes, Vaults, 8vo., of which the following is aspeciication:

Nature and Objects of the Invention.

My invention relates to bolts in the form of screws, which, in fasteningthe door, are made to enter corresponding threaded apertures in thedoor-frame of the safe or vault, so as not only to hold the doorusecurely shut but to prevent the possibilty of spreading or springingany part of the frame, either by violence in a fall or by the'application of a wedge, jack, or other implement in the hands of aburglar. My lnvention consists inthe combination `with suchscrew-bolts,`arranged in one" or more radial groups with three or morebolts 1n each group, of a single check-lock, arranged to throw its boltor bolts centrally between them, to prevent their retraction, ashereinafter specified.

Description of the Accompanying Drawing.

Figure lis a front view of a safe with the door open, exposing the rearor inner side of the door, a portion ofthe door-frame being shown insection; Fig. 2 is a horizontal section ofthe same on the line c: a',Fig. 1. Fig. 3 is asection of one of the bolts and its attachments.

General Dcscwptfion'. A may represent the door-frame of a safe orvault,`with threaded sockets B, for the reception of the door-bolts, andwith the hinges G (l, by which the door D is hung. v E E represent thedoor-bolts. These are formed with screw-threads working withincorrespondingi of feathers f in the pinions working in grooves e, or byforming the ends of the bolts and the apertures of the pinionsLwithinwhich they fit, in square or other non-circular shape. The pinions F Fare preferably beveled, and two, or three, or more of them may gear witha pinion, G, keyed upon the shaft H, which is rotated by an externalknob, I, in order to impart 4the necessary rotation to the bolts tothrow them -in or out.

In the present illustration I have shown three screw-bolts arranged inthe upper part ofthe door, and three in the lower part of the door,which latter three may be operated by a separate knob, shaft, andpinion, I H G. The lock J may be of any suitable construction. I havehere illustrated it as described in Letters Patent heretofore granted tome, so as to be operated by a gear-wheel, K, and a spindle external tothe mechanism of the lock itself. This or any other kind of lock whichmay be used, is. adapted to throw its bolts behind or between the innerends of the door-bolts E, when the latter are projectedV into theirsockets within the door-frame.

In the illustration given in Fig. 1 the door being open, the door-boltsE and lockbolts L are, ofcourse, all retracted. If, now, the door beclosed and the knobs I rotated in-the proper direction, the door-boltsE, turning freely within their sockets d, will be made to project fromthe edges of the door and enter the sockets B of the frame A to thenecessary distance. The lock-bolts L; being then thrown out in the usualway, will be interposed between the inner ends of the bolts E andeffectually prevent the retraction of the said bolts.V

From the above description it will appear that-the bolts work inthreaded apertures in both thedoor and the doorframe, so as to hold thetwo firmly together, not only against the opening ofthe door, butagainst any possible spreading of theV frame, so thatwhile the door isshut andlocked, the entire door and frame are iirlnly screwed together,and may havev as great strength as if formed in one solid piece.

In the present illustration the lock shown in the center of the door mayrepresent a check-lock operating two bolts up and down, or any otherlock for checking the screw-bolts can be used according to the spaceavailable and other conditions, precisely as in the ease 0f the t'. n1111011 SUIOOI bolts.

The invention is adapted for all burgarproof work, either in portablesafes or in vaultdoors, or any other appliance Where such security isrequired. Y

Claim.

l What I claim as new in this my invention 1s The serewboits E, arrangedin a radial group or groups of three or more, in combination with acheek-lock, J, adapted to throw its bolt or bolts between their innerends and thus prevent their retraction, as herein shown and described.

LUKE H. MILLER.

Witnesses WM. D. MILLER, Jr., CRAs. H. JONES, M. D.

